//定制请求的实例

//导入axios  npm install axios
import axios from 'axios';
import { ElMessage } from 'element-plus';
//定义一个变量,记录公共的前缀  ,  baseURL
const baseURL = '/api';
const instance = axios.create({baseURL})
import { useTokenStore } from '@/stores/token.js';
import router from '@/router';
//请求拦截器
instance.interceptors.request.use(
    (config)=>{
        const tokenStore = useTokenStore()
        if(tokenStore.token){
            config.headers.Authorization=tokenStore.token
        }
        return config;
    },
    (err)=>{
        Promise.reject(err);
    }
)
//添加响应拦截器
instance.interceptors.response.use(
    result=>{
        if(result.data.code===0){
            return result.data;
        }else if(result.data.code===2){
            return result.data;
        }else if(result.data.code===1){
            return result.data;
        }
        //alert(result.data.msg?result.data.msg:'服务异常');
        ElMessage.error(result.data.msg?result.data.msg:'服务异常');
        return Promise.reject(result.data);//异步的状态转化成失败的状态
        
    },
    async err => {
        if(err.response?.status === 401){
            const tokenStore = useTokenStore();
            // 先清除 token
            tokenStore.removeToken();
            
            ElMessage.error('请登录');
            // 然后跳转
            await router.push({
                path: '/login',
                replace: true
            });
        }else{
            ElMessage.error('服务异常');
        }
        return Promise.reject(err);//异步的状态转化成失败的状态
    }
)

export default instance;